CAJ | 학술논문

夏季选取了滇池不同来源(滇池湖体、入湖河流和大气降雨)水样,研究了其溶解性有机磷(DOP)含量及分布特征,并利用酶水解技术表征了其 DOP 生物有效性.结果表明,滇池湖体、入湖河流和大气降雨 DOP 浓度分别在0.001~0.117,0.002~1.722,0.006~0.112mg/L(平均0.027,0.197,0.037mg/L),分别占溶解性总磷(DTP)的18.3%~92.5%,4.2%~100%,25.4%~100%(平均55.3%,60%,58.9%),不同来源 DTP 均以DOP 为主,入湖河流 DOP 浓度明显高于滇池湖体和大气降雨.不同来源 DOP 酶可水解磷(EHP)浓度分别为n.d.~0.058,n.d.~0.673,n.d.~0.031mg/L(平均0.017,0.064,0.010mg/L),分别占 DOP 的0%~127.5%,0%~105.6%,0%~55.6%(平均77.9%,38.7%,23.2%).不同来源DOP酶水解率(EHP/DOP)较高,滇池湖体DOP酶水解率明显高于入湖河流和大气降雨.不同来源DOP时空分布特征明显,且其生物有效性存在较大差异.其中,滇池湖体EHP以活性单酯磷和类植酸磷为主,入湖河流和大气降雨EHP以活性单酯磷为主,尤其是大气降雨二酯磷和类植酸磷含量较少,滇池湖体、入湖河流和大气降雨DOP生物有效性依次降低.不同来源DOP是与溶解性反应磷(SRP)同等规模的生物可利用磷源,二者共同维持了滇池富营养化.滇池治理要从全流域出发,考虑不同来源各形态磷对水质的影响.
하계선취료전지불동래원(전지호체、입호하류화대기강우)수양,연구료기용해성유궤린(DOP)함량급분포특정,병이용매수해기술표정료기 DOP 생물유효성.결과표명,전지호체、입호하류화대기강우 DOP 농도분별재0.001~0.117,0.002~1.722,0.006~0.112mg/L(평균0.027,0.197,0.037mg/L),분별점용해성총린(DTP)적18.3%~92.5%,4.2%~100%,25.4%~100%(평균55.3%,60%,58.9%),불동래원 DTP 균이DOP 위주,입호하류 DOP 농도명현고우전지호체화대기강우.불동래원 DOP 매가수해린(EHP)농도분별위n.d.~0.058,n.d.~0.673,n.d.~0.031mg/L(평균0.017,0.064,0.010mg/L),분별점 DOP 적0%~127.5%,0%~105.6%,0%~55.6%(평균77.9%,38.7%,23.2%).불동래원DOP매수해솔(EHP/DOP)교고,전지호체DOP매수해솔명현고우입호하류화대기강우.불동래원DOP시공분포특정명현,차기생물유효성존재교대차이.기중,전지호체EHP이활성단지린화류식산린위주,입호하류화대기강우EHP이활성단지린위주,우기시대기강우이지린화류식산린함량교소,전지호체、입호하류화대기강우DOP생물유효성의차강저.불동래원DOP시여용해성반응린(SRP)동등규모적생물가이용린원,이자공동유지료전지부영양화.전지치리요종전류역출발,고필불동래원각형태린대수질적영향.
The content and distribution characteristics of dissolved organic phosphorus (DOP) were studied by collecting water samples from different sources of Dianchi Lake (overlying water, inflowing rivers and rainfall) in summer,and the bioavailability of these DOP were also characterized by emzymatic hydrolysis. The results indicated that the concentrations of DOP from overlying water, inflowing rivers and rainfall ranged from 0.001~0.117, 0.002~1.722 and 0.006~0.112mg/L (average, 0.027, 0.197 and 0.037mg/L), respectively, and constituted 18.3%~92.5%, 4.2%~100% and 25.4%~100% (average, 55.3%, 60% and 58.9%) of dissolved total phosphorus (DTP), respectively. DOP predominated their DTP of the different sources samples, and the concentrations of DOP from inflowing rivers were significantly higher than that from overlying water and rainfall. The concentrations of enzymatically hydrolysable phosphorus (EHP) of DOP from different sources ranged from not detectable (n.d.)~0.058, n.d.~0.673 and n.d.~0.031mg/L (average, 0.017, 0.064 and 0.010mg/L), accounting for 0~127.5%, 0~105.6%and 0~55.6%(average, 77.9%, 38.7%and 23.2%) of DOP, respectively. The enzymatica hydrolysis ratio of DOP (EHP/DOP) were relatively high and EHP/DOP from overlying water was significantly greater than that from inflowing rivers and rainfall. DOP from different sources showed evident characteristic of spatial and temporal distribution and their bioavailability had great differences.Labile monoester P and phytate-like P represented primary portions of EHP from overlying water, whereas, labile monoester P accounted for major sections of EHP from the inflowing rivers and rainfall, especially for EHP of the rainfall which had relatively low concentrations of diester P and phytate-like P. The bioavailability of DOP from overlying water, inflowing rivers and rainfall declined in turn. DOP from different sources represented the available P of equivalent magnitude to soluble reactive phosphorus (SRP), that meant EHP and SRP keep the eutrophication of Dianchi Lake together. So the effects of different phosphorus species from different sources on water quality should be considered for protection of Dianchi Lake from the whole watersheds.